pridmore



(No Model.) 3 SheetsSheet 1. E. PRIDMORE. DISK HARROW Patented Aug. 22, 1893.

aZEZ-ameys,

(No Model.) 3 Sheets-Sheefi2. E. ,PRIDMORE. DISK HARROW Patented Aug. 22, 1893.

W w I I. 31 v W W iilzesses:

(No Model.) 3 Sheets&h eet1 a.

E. PRIDMO'RE. DISK HARROW.

. No 503,774. Patented Aug. 22, 1893.

UNITED STATES PATENT OFFICE.

EDWARD PRIDMORE, OF BATAVIA, NEW YORK, ASSIGNOR TO THE JOHNSTON HARVESTER COMPANY, OF SAME PLACE.

DISK HARROW.

SPECIFIGAHLON forming part of Letters Patent No. 503,774, dated August 22, 1893.

Application filed April 11, 1892.

To all whom it may concern.-

Be it known that I, EDWARD PRIDMORE, a citizen of the United States, residing ;at Batavia, in the county of Genesee and State of New York, have invented new and useful Improvements in Disk Harrows, of which the following is a specification.

This invention relates to a disk harrow which contains a large number of disks and which is particularly designed for use in large fields and adapted to be drawn by steam power.

The objects of my invention are to improve the construction of the harrow, to permit of usingalarge number of disks, and to provide a simple and reliable device whereby the scrapers are held in or out of contact with the disk.

In the accompanying drawings consisting of three sheets-.Figure 1 is a top plan view of my improved harrow, partly in section. Figs. 2, 3 and 4 are vertical longitudinal sections, on an enlarged scale, in lines 0cw,yy and z-z, Fig. 1, respectively. Fig. 5 is a side elevation of the Windlass for changing the position of the disk gangs. Fig. 6 is a fragmentary rear elevation, on an enlarged scale, of the scraper-shifting device, showing one of the scrapers in contact with one of the disks. Fig. 7 is a similar view, showing the scraper out of contact with the disk. Fig. 8 is a vertical section in line 'v v, Fig. 6. Fig. 9 is a horizontal section in line w-w, Fig. 6.

Like letters of reference refer to like parts in the several views.

A represents the draft pole which consists preferably of two rearwardly diverging members a a which are secured together at their front ends and provided with a ring or loop a with which the motive power is connected.

B represents the main cross piece of the harrow frame which is secured at its middle to the under side of the pole near the rear ends of its members.

0 represent the diagonal braces extending from the outer portions of the main cross piece to the front portion of the pole and forming with these parts the rigid draft frame of the harrow.

Serial No. 428,610- (No model.)

the harrow disks mounted upon shafts e, each of which is journaled in depending bearings f f f f secured at regular intervals to the under side of each gang plank from the inner toward the outer end of each gang.

G represents equalizing bars which connect the outer portions of the disk gangs with the ends of the main cross piece and serve to equally distribute the strain upon the outer portions of each disk gang. Each equalizing bar is arranged transversely in front of the outer portion of the disk gang and connected to the lower portions of the outer bearings f f f by three pairs of links 9 g g The ends of the equalizing bar are connected to the bearings f f by the end links 9 g while the middle of the bar is connected with the bearing f by the middle links 9. The end links are secured with their front ends to the upper and lower sides of the equalizing bar by vertical pivot bolts hand the middle links are pivotally secured with their front ends to the upper and lower sides of the middle of the equalizing bar bya vertical bolt h. The rear ends of each pair of links rest one upon the other and are pivotally attached to the lower portion of the depending bearing by a vertical pivot bolt h i represents braces connecting the upper members of the links with the upper portions of the disk bearings.

J represents a pair of straps whereby the middle of each equalizing bar is connected with the end of the main cross piece B. Each pair of straps is secured with the front ends to the upper and lower sides of the cross piece B by boltsj, while the rear ends of these straps are secured to the upper and lower sides of the middle links and to the equalizing bar by the front pivot bolt 77/ of the middle links 9'. Upon shifting the disk gangs the equalizing bars turn on the front pivot bolts h of the middle links and the several links accommodate themselves to the position of the disk gangs and equalizing bars. If desired, the equalizing bars may be lengthened and additional links may be employed for connecting the equalizing bars with the disk gangs.

By employing the equalizing bars between D D represents the gang-planks, and E E 50 the draft frame and the disk gangs, a large by a knuckle joint 76 arranged between the number of disks can be employed in each gang and the strain upon the disks is more uniformly distributed.

As represented in the drawings the disks are arranged with their concave sides facing outwardly which produces an inward thrust? of the disk gangs. This thrust is taken up" the bearings f at the inner ends of the diskv gangs; The front ends; of the drafit bars aref benttoward each other and are connected by} in Fig, 1,* thereby sustaining the draft bars against upward pressureas near the disk gangs as possible.

R represents a caster wheel arranged underneaththe front portion of the pole. I S represents the scrapers whereby the ground isremoaed from the disks and which are secured to asupporting bar .9 arranged lengthwise underneath each gang plank and imdvingiin hangers s. s represents a shifting lever whereby the scraper bar is moved in the direction of its ileagth-for the; purpose.- of throwing the T represents a loop which is secured to the rear side of the gang plank and, provided with a forwardly 'projeeting pin tuponwhich the-shifting lever is pivoted near its: lower -scrapers in or out,..of contact'with the disks.

' I 5 by vertical bolts Z with the lower portions of 8 a ringl. fen-d. Thel ower arm-of theshiftingleverem 5 N represents a windlasswhereby-the angle 5126178 ailoopsecured to the rearsid e; oi the of the disk gauge is shifted. The drum n of g scraper bar for the purpose of movingthe the Windlassis arranged between bothmem- 1 latter. r bers of the pole and mounted upon a tra su represents a weight lever-"which securely verse shaft n" jburnaled in the members of g holds the shifting lever in eitherextrernepothe pole. The drum is connected with the Z siti'on fH'Wh'lGh the scrapers are either in or ring; Z of the draft barsbya chain 0*,arrdthe out of contact-with the disks. This weight latter is wound upon; the drum by a hand 10- leverispi'voted tothe shifting lever above verpw'hich is pivoted loosely upon the drum 3 the pivot of the latter and is provided at the shafit'n" and provided with a pawl 10 which fiend or its long upper arm with a weight u. engageswi th-a ratchetwheel fisecuredtothe The short lower arm of the weight-lever is drumshaft. The m"i heldagainstre-turri provided with aor which receives a, stamovement; when desired; by a deterrt, pawl 19 s i tionary' pin 11. 5 This pin projects inwardly pivoted. on the side of the pole and engaging 5? fromthe upper end of a bracket projectwi'th the ratchet wheel. Upon. turning the ing upwardly from. the loop T. Upon movdrum in the proper direction the chain i iirg the shifting leverfrom orre extreme posiwound upon the drum, 'thereby drawing the tion totheothentheweightdeverisshi fted in inner ends of. the gangs forwardl'ya-nd de- 'theasame direction, sinceit is pivoted to the creasing" the angle of both gangs. When it i ishi ftinglever but the'weightedcnd oi" the is desired to; place the disk gangs at ag reater fweightglever travels more rapidly than the an-gle the drum isrel'eased toperm-itthe chain 1 shifting lever, because the stationary pin L0 to unwind and upon draw in-g'the harro'w'forretardsi thelower arm of theWeight leWra/nd wardly' the inner ends of the disk gangs wiH ft-hereby causes an accelerated movement of trail until theslaek of the chainis taken up, v the upper weighted end of the same The when the disk gangs will remain in that vpoiweightlever'exerts a pressure entheshifti ng sition. lever and, scraperbar aii'either' extreme-posh When the disk gangs are arranged at an Yti'on of. the shifting lever and so 'holds the angle, their inner ends tend to rise when in gscrape-rs securely in or'out of contact with use, thereby causing an upward strainon the: I the disks. It is desirable to applya-greater rear ends of the draft bars and this strain ,pressure;tothescraperswhen theyarein'con increases; as v the angle of the disk gangs is: l tact with the disks than when they are out increased. To relieve this strain upon the: ,of contact therewith. For this purpose the draft bars the members of the pole; are pro-- -slot Win the lower arm of the weight-lever is vided. with rearward extensions or horns .Q; -arranged obliquely-across a radial line drawn which areal-ranged lengthwise over the draft. ifromthe pivotaof the weightle-ver: Thisconbars, as representedin-Figl. Theunde-r-si'diesi l struction of the slot causes. the; weight lever of, these hornsarepro-Yided with filling blocks. to overhang farther when the shifting lever q;- whose lower surfaces are flu-sh withtheuu- 1 in the position for holding the scrapers in der-side of thecross pi'eoeB; so that: thedraft; contact with the disks, as represented in Fig. bars bear with. their upper sides against the, i6, than when the scrapers are: out of con-tact lower sides of the main cross piece andthe :with the disks, as, represented? in- 7;there* fill'rn'g pieces, whereby the upward thrust fibyincreasin-g the leverage of the weighted on the draft, bars is evenly applied to the; ipart of the lever'andexertiinga greater pressmain cross. piece, and the horns of, the pole; u-re upon the. scrapers I claim as my invention- 1. The combination with the harrowframe, of transverse-equalizi ngbars arranged in rear of the harrow frame, disk gangs arranged in The hornsextend rearwardliyto withina. short-distanceof the inner bearings f of the. disk gangs when the latter are in a straight position, as indicated by the dotted lines rear of the equalizing bars, longitudinal straps extending from the harrow frame rearwardly to the middle portions of the equalizing bars and connected with the frame and bars by vertical pivots, and longitudinal links and vertical pivots connecting the end portions of the equalizing bars with the disk gangs, substantially as set forth.

2. The combination with the harrow frame,

of transverse equalizing bars arranged in rear of the harrow frame, disk gangs arranged in rear of the equalizing bars, longitudinal straps extending from the harrow frame rearwardly 'to the middle portions of the'equalizing bars der-sides with filling pieces, whereby the upward movement of the draft bar is restrained, substantially as set forth. I

4. The combination with the disk gang, the gang plank, the scraper bar and the scraper, of a shifting lever connected with the scraper bar and pivoted to the gang plank,a stationary support mounted upon the gang plank, and a weighted lever pivoted to the shifting lever and connected with said stationary support, whereby the movement of the shifting lever reverses the position of the weighted lever, substantially as set forth.

5. The combination with the gang of disks, the gang plank, the scraper bar and scrapers, of a shifting lever pivoted upon the gang plank and connected at its lower end with the scraper bar, a weighted lever pivoted to the shifting lever and provided with a slot in its short arm, and a stationary pin mounted upon the gang plank and engaging in said slot, substantially as set forth.

6. The combination with the gang of disks, the gang plank, the scraper bar and-scrapers, of a loop secured to the gang plank and provided with an inwardly projecting pin, a shifting lever pivoted upon said pin and connected at its lower end with the scraper bar, a weighted lever pivoted upon said shifting lever and provided with a slot in its short arm, and a bracket formed on said loop and provided with a stationary pin which engages in said slot, substantially as set forth.

Witness my hand this 7th day of April, 1892.

EDWARD PRIDMORE.

Witnesses:

GEORGE 0. Von, E. K. OALKINs. 

